99498991 has 12 divisors (see below), whose sum is σ = 106817320. Its totient is φ = 92400480.

The previous prime is 99498983. The next prime is 99499003. The reversal of 99498991 is 19989499.

It is not a de Polignac number, because 99498991 - 2³ = 99498983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99498901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339441 + ... + 339733.

Almost surely, 2^99498991 is an apocalyptic number.

99498991 is a deficient number, since it is larger than the sum of its proper divisors (7318329).

99498991 is an equidigital number, since it uses as much as digits as its factorization.

99498991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 373 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 58.

The square root of 99498991 is about 9974.9180949018. The cubic root of 99498991 is about 463.3824259468.

It can be divided in two parts, 99498 and 991, that added together give a square (100489 = 317²).

The spelling of 99498991 in words is "ninety-nine million, four hundred ninety-eight thousand, nine hundred ninety-one".